The Grim Adventures of Billy & Mandy

Pandora's Lunch Box (6x13)

Air date: Mar 22, 2006

When a girl named Dora comes to Billy and Mandy's school, she and Mandy become instant friends. While watching Mindy and the cheerleaders, Dora tells Mandy that if she opens her lunchbox. There's something that could destroy Mindy. Since Mandy wants to destroy Mindy, she opens the lunchbox, unleashing evil demons shaped like food. It turns out that Dora is actually Pandora, and she tricked Mandy into unleashing all of the demons. Mandy, angry that Dora tricked her, stops the end of the world by sucking the demons and Dora into the lunchbox.